Steam-boiler furnace.



F. A. SHOEMAKER. STEAM BOILEB FURNAOE. Arrmoulon FILED AUG. o, 190s.

Patented 0ct.26,1909;

2 SHEETS-*SHEET 1.

WITNESSES.

C; La@

F. A. SHUEMAKEB.

SIEACI BOILEB FURNAGE.

PLIOATIOH FILED AUG. 6, 1908.

938,022, f Patented 0013.26, 1909. 2 SHEETS-SHEET '2.

FIG. 2

FIG. 3

INVENTR. wlrNEssEs. 3 L7 22 ymmm VV"the magazines between the tubes into the essbaa AUNITED sTATEs PATENT oEErcE.

'FRANK A. SHOEMAKER, OF IBUIEFAIIJO, NEVI YORK, .ASSIGNOR TO JAMES STURDY, 0F BUFFALG, NEW YORK, AND JOI-IN STURDY, 0F GRAFTON, PENNSYLVANIA.

STEAM-'BOILER FURNACE. i

To all whom 'it 'may concern.'

Be it known that I, FRANK A. SHOE- MAKER, a resident of Buffalo, in the county of Erie and State of New York, have in-l and causing the 'entire combustion thereof so y as to practically eliminate the discharge of smoke.

In the improved furnace I provide a suitable boiler, a combustion .chamber below the same and two racks of upright triangular Iwater tubes below and extendinglongitudi# `nally of the boiler and on each side of the combustion chamber with .the circulating water connections betweenthe racks andthe boiler, and firing magazines outside of said racks the flat outer faces of-the tubes forming the inner Walls of the firing magazines, so that in the combustion of the fuel the Haine and unconsumed gases will pass from combustion chamber where complete combastion takes place, the .same passing in regular course to heat the boiler, and the water in circulation in the tubular racks serving to protect the same from burning and also to absorb a large amount of heat and soincrease the heating properties of the apparatus.4 The openings between the water tubes are narrow on the side of the ring magazine and flare or increase in cross section to- Ward the combustion chamber. Both the tubes 4and openings are conveniently made triangular in cross section, but Ido not limit myself to this constructiong'as any const-ruction having abrupt narrow openings for thel incoming gases from the firing magazine with passages rapidly increasing incross section toward the combustion chamber is within the spirit of my invention.

In the accompanying drawing Figure l is a side View showing the boiler in full lines and the furnace on the line 1 1 Fig. 3; Fig. 2 is a crossv section on the line 2 2 Fig. 1; Fig. 3 is a horizontal section on the lineB-S Fig. 2; Fig. 4 shows in its upper Specification of Letters Patent. Patented 0017. 26. 1909. Application fried August e, 1908. I

Serial No. 447,221.

part a side View of one of the headers and connecting tubes, and in its'lower part a sectional view thereof; and Fig. 5 is a cross section on the line :SM5 Fig. 4.

llhe invention may be-applied to any suitable boiler, that shown being an ordinary fire tube boiler, as at 1, built within suitable brick work, the front wall of the brick work being shown at 2,the side wall at 3, the rear wall at 4; Underneath the front part of the.

boilerl is the 'combustion chamber 5 and on each side thereofl are thc racks G (S formed of a series of upright tubes se arating the combustion chamber from the iring magazines 7 the cross walls 8 forming the rear chambers of such firing inagazmes. The combustion chamber 9 through which the heated products of combustion pass in the rear of the boilers and up and back through the fines thereof, communicates with the chamber 10 leading to the chimney or flue.

The tubular 'racks 6 extend for the full length of the firing magazines and form their inner walls. 'Ihey are preferably set at an upward and outward inclineas shown, to properly confine the fuel in the magazines and provide increased space in the upper part of the central combustion chamber for the purposehereinafter described. Such/racks can be of'anyv desired construction provided their lmain portions are formed of tubes having suitable water circulating connections with they boiler. IVe

prefer to construct the same in the following` and bearing against suitable fianges 17 riveted to the boiler. To git/5c circulation through these tubes I provide the down-take pipe 1S having suitable pipe connections 19v with the lower headers 11, and also provide the pipe connections 20 leading from the upper headers "l2 into the boiler as shown. As shown in "the drawings the tubes 13 have suitable webs or fins 21 exteiiding from the l 'doors 23.; n Sunbe depth of' fuel bein# n ppe' beidem down conine fh@ ue WMV 7, such webs being p1 yu'bes.

mainnimz in such chambers :md Aim 5mm exedng wall @this top of the Saune, *522e the top and 'bottom of? the nel bai? @Luchas 4by opening the top ofi fuel doors andthe:

fthe centrali cmnbl'lstion chanjzfnax, such Jehambex: 9 und@ and around hhs 'Smeg turning; through the'bumr Nues :m than passim@ thrmlgh the Hue 5.6, im intense `whim bmfg mamfaamad `mhm the mmbu-k um; chap-mb@ and ail of the gases from the oc. i. a@ pcrfecty wnsumad'o that n0 smoke 3% fell-mm1 lfmc sscapes 'omihe maca. in such operatlon ille ax'mg spaces m' um? boing n this Way so heated vthat bscmnes water heating powers of the furna'ce. At the same time the racks and their connecting pipes are properly cooled so t-hatall `liability of burning out the same is overcome, a durable furnace construction being thus provided. By forming the tubes of the racks integral with the' headers the number of joints requiredis reduced to a minimum and i the liability of burning out the parts or of leakage is prevented.

Practical use of the invention has demonstrated that a perfectcombustion is obtained and that even when fresh fuel is fed to the firing chambers all the gases are consumed and the furnace produces practically no smoke. The furnace is a great economizer 'of fuel, requiring only about two-thirds of in an ordinary boiler furnace to produce thesame heat units. Full access is given to the Y tiring chambers to provide for the removal of clinker ,vash', etc., and to the central chamber for repairs, and but little labor is required in the operation the fuel required v' of the furnace.

in cross'sect-ion separating the combustion chamber from the spaces between the only vpassage for magazine to said being of increasing width firing magazine, the said tubes forming the gases from said firing combustion chamber and from their inlet ends toward their outletsintoithe combus-l tion chamber.

3. Aboiler furnace bustion chamber below firing magazines, two racks of water tubes separating said combustion chamber from said ,tiring magazines, the passages between the tubes flaring toward the combustion chamber and presenting abrupt narrowopenhaving a boiler, a com- 'ingsfor the incoming gases from the'firing magazines.

4. A boiler furnace having a fire tube boiler', a. combustion chamber beneath it, two racksof substantially triangular water tubes below and connected to said boiler and inclosing said combustion chamber and having a passage between them leading to said fire tube boiler, and a firing magazine. outside of said racks, the triangular water tubes presentingiiat faces to the tiring magazine.

5. A boiler furnace having a combustion l chamber below the boiler-,two racks of uphaving a boiler, a comf the boiler and twoV .the boiler,

i right water tubes below and extending lon! gitudinally of the boilei', and liring magazines outside of said racks, the firing magazines having t'wo air openings respectively, adjacent to their upper and lower portions, and the water tubes having substantially flat outer faces and passages ing toward the combustion chamber.

6. A boiler furnace having a combustion chamber below the boiler, two racks of upright water tubes below and extending longitudinally of the boiler, and fuel magazines outside of said racks, the tubes of the racks having Hat outer faces forming the inner walls of the firing magazine and abrupt narrow openings between said faces.

7 A boiler furnace having a combustion chamber below the boiler, two racks of water y tubes below and extending longitudinally of the boiler, tiring magazines outside of said racks, the` tubes of the racks being triangular in shape andhaving their outer faces orming the inner walls of the tiring magazines. .Y A boiler furnace having a eombbustion chamber below the boiler, two racks of water tubes below and extending longitudinally of firing magazines outside of said racks, the tubes of said racks being right angled triangles in cross section and havin their outer faces forming the inner walls o the firing magazines.

9. A boiler furnace having a combustion chamber below the boiler, two racks of upright water' tubes below and extending longitudinally of the boiler, 4firing magazines outside of said racks, the tiring magazines having feeding doors in their upper portions and ash pit doors at the base thereof, and the tubes having webs on their ,upper portions closing the spaces between them.

10. A boiler furnace having a combustion chamber below the boiler, two racks of uprightwater tubes below andk extending longitudinally of the boiler, fuel magazines outside of said racks, the tubes 'of the racks being triangular in shape and having webs' on their. upper between them, and the firing magazines ing feeding doors above said webs. 11. *A boiler furnace having a combustion chamber below the boiler, two racks of upright water tubes below and extendinglongitudinally of the boiler, firing magazines outside of said racks, said tubes bein triangular in cross section, their flat faces fo' portions closing the spaces rming the 'inner walls of the firing magazines and the flaring spaces in the combustion chamber between said tubes extending backwardly on the line of draft.

12. A boiler furnace having acombustion chamber and a iii-ing magazine'and a single rack of water tubes separating them, the openingsI between the tubes flaring toward the combustion chamber,

between them ilarbeing abrupt and e 13. boiler urnacehaving beer, u .sage from sad'combustion chamber to saidl combuson chamber, a sepa3.a.te rmg maga* bole'. f zine having two ufr-openings: it its iop and In 'testimony whereof, the Said FRANK bottom pm'inns repcfltwljm a ruck Wam' A. Snom MAKER have hereunto Set my hand.' tubes separating ,mid L11-ing' gmx fram I FRANK A. SHEMAKERL combusi m1 chamber, Smid babes ,having I 'Ytxxesses: A

openings betwen hem inmeasng in Width FRANK H. LONG, tcm/ard dm coznbus'clim chmrbm, and f1 pm HAZEL M. FISCHER. 

